PerformanceDiagnostic: give an error if a generic non-copyable value with a deinit is captured by an escaping closure. #74988
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Otherwise IRGen would crash.
It needs a bit of work to support alloc_box of generic non-copyable structs/enums with deinit, because we need to specialize the deinit functions, though they are not explicitly referenced in SIL. Until this is supported, give an error in such cases.
Fixes a compiler crash in IRGen
rdar://130283111